Import foreign schema support in Multicorn

Some of you may have noticed that support for the IMPORT FOREIGN SCHEMA
statement has landed in the PostgreSQL source tree last july. This new command
allows users to automatically map foreign tables to local ones.

pg_qualstats - 1st part

pg_qualstats is a new extension allowing you to collect statistics about what predicates are effectively executed on your PostgreSQL instance, sponsored by Dalibo This post is part of a series explaining pg_qualstats, and its integration with PoWA, the PostgreSQL Workload Analyzer.